黄河中游多沙粗沙区治理对黄河下游减淤影响研究ppt课件

1、黄河中游多沙粗沙区治理对黄河下游减淤影响研究The Impact Research of Controlling to Sediment-laden and Coarse Sand Area in the Middle on Sedimentation Reduction of the Lower Yellow River 黄委会水文局Hydrology Bureau ，YRCC 高亚军 Gao Yajun 2007.6.汇 报 内 容CONTENT1、多沙粗沙区和粗泥沙集中来源区简介 Introduction of sediment-laden and coarse sand area an

2、d coarse sand concentrated source region of the middle Yellow River 3、多沙粗沙区各治理分区来沙对下游河道冲淤影响的估算 Outline the area of the sediment overloaded and coarse sediment region to estimates the erosion and sedimentation of rivers lower reaches2、多沙粗沙区治理分区的确定 The define of sub-area in sediment-laden and coarse s

3、and area controlling.1 多沙粗沙区和粗泥沙集中来源区简况 Introduction of sediment-laden and coarse sand area and coarse sand concentrated source region of the middle yellow river 多沙粗沙区和粗泥沙集中来源区的位置 The location of the sediment - laden and coarse sand area and the coarse sand concentrated source region . 多沙粗沙区在黄河中游的产沙

4、贡献 Contribution of sediment production in Sediment-laden and coarse sand area of the middle yellow river 结论：多沙粗沙区是拦截入黄泥沙的重点区Conclusion: The sediment-laden and coarse sand area is the most important area to head off the sediment into Yellow River. .粗泥沙集中来源区在多沙粗沙区中的产沙贡献Contribution of sediment product

5、ion in coarse sand concentrated source region of the middle Yellow River结论：粗泥沙集中来源区是拦截入黄粗泥沙的重中之重地区Conclusion: coarse sand concentrated source region is the most important area to head off coarse sediment into Yellow River. .2 多沙粗沙区治理分区的划分The define of sub-area in sediment-laden and coarse sand area

6、controlling 2.1 划分原则Dividing Principles 1.快速减少下游河槽粗泥沙淤积； The rapid degradation of the coarse sand of Channels sedimentation deposition in lower .2.治理面积相对较小，拦减粗泥沙量相对较多； A relatively small area and the relatively large amount of coarse sediment reduction interceptions .3. 对入黄水资源影响较小；Little Impact of t

7、he Yellow River Entered water Resources .4.当地生态环境改善与下游河道减淤同步。Principle to improve the ecological environment and in the lower reaches Minimizing deposition of synchronicity .2.2 分区指标Dividing index 经过论证，以粒径0.1mm为粗泥沙界限，以粒径0.1mm的粗泥沙输沙模数1400 t/(km2a)和700 t/(km2a)为指标，对多沙粗沙区进行进一步划分。 After verification, we

8、 take the diameter larger than 0.1mm in diameter as limits of coarse sediment, and take 1,400 tons sediment modulus (km2a) and 700 tons(km2a) which have larger than 0.1mm diameter sediment as an indicator to further divide the sediment-laden and coarse sand areas.2.3 划分结果Dividing Result1区：F=1.88万km2

9、2区：F=2.06万km23区：F=3.92万km2.Way1：Index selection According to the above results and the research results of zhangren, for estimating the effect of deposition and erosion in the lower reaches of the river, If the first, second and third districts were intercepted 100 million t of sediment, the reducti

10、on of the lower reaches of the river estimated at 0.7 million tons,0.5 million tons and 0.3 million tons by lower volume.3多沙粗沙区各治理分区来沙对下游河道冲淤影响的估算 Outline the area of the sediment overloaded and coarse sediment region to estimates the erosion and sedimentation of lower reaches of a river .3 多沙粗沙区各治理

11、分区来沙对下游河道冲淤影响的估算Outline the area of the sediment overloaded and coarse sediment region to estimates the erosion and sedimentation of lower reaches of a river ProjectUnitSediment reductiontargetsZone1Zone2Zone3the sediment overloadedand coarse sediment regionAreakm21.882.063.927.86Surface water quant

12、ity*108m310.197.9913.0031.18Sediment transportingquantity*108 t2.771.903.348.01Sedimentreductionquantity*108 t10%0.280.190.330.8020%0.550.380.671.6030%0.830.571.002.4050%1.390.951.674.0170%1.941.332.345.6190%2.491.713.017.21Sedimentationreduction quantity*108 t10%0.190.100.100.3920%0.390.190.200.783

13、0%0.580.290.301.1750%0.970.480.501.9570%1.360.670.702.7290%1.750.860.903.50.3.2 多沙粗沙区不同程度治理后对黄河下游减淤量的估算Outline the area of the sediment overloaded and coarse sediment region to estimates the erosion and sedimentation of lower reaches of a river. 时段period项目Project来沙(亿t）Come silt下游河道淤积(亿t）deposition i

14、n the lower reaches单位来沙淤积比Come silt deposition ratio来沙贡献(亿t）Come silt contribution1950-2000六站Six station13.513.38 7.868.01 25%2.001.882.880 33%0.95 way 2 According to the six station and lower reaches silt deposition ratio to calculate silt deposition per unit. We had the ratios are 25% and 33%, the

15、 depositions are 2 and 0.95 hundred million tons. 3 多沙粗沙区各治理分区来沙对下游河道冲淤影响的估算Outline the area of the sediment overloaded and coarse sediment region to estimates the erosion and sedimentation of lower reaches of a river . 主要结论 Conclusions多沙粗沙区得到不同程度治理后，在减少入黄沙量的同时，也减少了下游河道淤积量，随着各治理分区实施水土保持综合治理程度的提高，拦减的入黄泥沙越多，相应的减少河道淤积量也越多。 After the Sediment-laden and Coarse Sand Area is under the varying degree government, while reduces into the yellow sand quantity, also reduced the lower reaches silt deposition quantity, along with each government